panic and chaos inside the airport. hundreds running to get away from the gunman. one tsa officer was killed, several more hurt. teri okita reports from l.a.x. >> reporter: these passengers are finally being let back the property. authorities say this is a very extensive investigation where terminal 3 where the incident took place is still closed and forensics teams are inside. they are learning much more about the suspect. >>> reporter: chaos at los angeles international airport friday morning where a gunman opened fire at a security checkpoint in terminal 3. >> i just saw the gun and i was just terrified and like everybody else was. we're all just on the ground. >> reporter: this is believed to be the gunman, 23-year-old paul ciancia, who was ultimately shot by police and is now in custody. >> this individual was shooting as he went into the terminal. the officers didn't -- i repeat, they didn't hesitate. they went after this individual and they confronted this individual. >> reporter: police say ciancia shot several tsa employees. one of them a behavior detection officer died.